Mattress Sizes and Bed Dimensions Guide (2022)

Ruchi Jaiswal  - Content Editor At The Island Now

You may choose various mattress sizes, from a single-person twin bed for when your child outgrows a crib to an extra-wide California king bed perfect for couples who prefer to spread out. The mattress size you select depends on your tastes, size, and weight.

This mattress measuring guide examines the measurements of each bed size, from the most popular to the most unique.


Mattress Dimensions: 38 x 75 (Inches) Kids or single sleepers who wish to make the most of their room’s space should choose a twin-size mattress. They can accommodate rooms as little as 7 by 9 feet because they don’t take up much space.  Kids prefer twin-size mattresses since they are the smallest size you can purchase and because the bed won’t take up as much area in their bedroom, giving them more space to play and do fun things. Other than that, twin-size mattresses are also pretty affordable. The bedding of twin size is also pretty affordable and easy to find, just like the mattress.

Best For: It is Best for children and bunk beds as well as individual sleepers.

Room Size: A twin bed can comfortably fit in a room that is 7 x 9 feet in size. You may need a room that’s at least 8 x 10 square feet in size to accommodate the bed in addition to other pieces of furniture, like a desk or a dresser. You should think about the stiffness, the materials, and, most notably, the size while choosing the best mattress. Although it may seem obvious, size is one of the most critical aspects. Apart from everything, mattress size determines its price; the bigger the mattress, the more expensive it would be.  

Twin XL

Mattress Dimensions: 38 x 80 (Inches) The Twin XL mattress is a long twin mattress best suited for older kids, college-aged students, or people who only sleep alone and require extra leg space. The smallest room you should use to fit a twin XL mattress properly is 8 by 10. 

Mattresses for twin XL beds are somewhat longer than those for regular twin beds. The twin XL mattress size is 80 inches long compared to the twin’s 75 inches. However, both the twin and twin XL mattresses are 38 inches wide and made for a sole sleeper. 

A twin XL bed’s extra 5 inches of height makes it more suitable for tall kids, teens, and university students. A twin XL bed will suit you more than a regular twin bed if you are 6 feet or more extensive. The standard-size mattress in a college dorm is most frequently a twin XL. Most college residence halls are this size because they more effectively satisfy single sleepers’ demands. Brands frequently offer two twin XL mattresses as a divided bed. The fact that twin XL mattresses are commonly used in dorm rooms makes it more challenging to obtain bedding that will fit them. 

So, when back-to-school shopping season rolls around, you can generally find many twin XL bedding. You might have a limited selection of items to choose from after that.

Best For: It is most suitable for older, taller adolescents, single adults, or anyone with limited space.

Room Size: The least space requirement for a twin XL bed to fit beautifully in a room is 8 feet by 10 feet. In spaces that are at least 7 feet wide, twin XL beds can also be a good option for sleeping arrangements.


MattressDimensions: 53 x 75 (Inches) Full-size mattresses are preferred by young people or partners who don’t mind sharing a bed since they are more extensive than twin mattresses but less expensive than queen mattresses. Full-sized mattresses are one of the most common and hottest selling products of all mattress sizes.

One big reason for its popularity is its adaptive size. Although a full-size mattress may fit two persons, it is most suitable for single users and it could also be a mattress for side sleepers. Two individuals can hardly fit in a double bed. A pair can each have 27 inches of room on a full mattress, which is 54 inches broad.

A twin-size mattress is 38 inches broad in contrast. For individuals who share a mattress with a restless sleeper who twists and flips at night, its tiny breadth may be an issue, and a double bed is probably not big enough for you to sleep comfortably. 

Memory foam mattresses are an excellent option for those with limited space since they reduce motion transfer when someone is moving about on them.

Best for: It works particularly well for teenagers, couples who enjoy snuggling, and guest rooms.

Room Size: A full-size mattress should be placed in a room at least 10 by 10 feet in size. This mattress can create a sleeping space for two people in a small room. Furthermore, this mattress provides the best value and can be found at affordable prices.

Full XL 

Dimensions: 54 x 80 (Inches)  A full XL is a suitable midpoint between a full and a queen-size mattress. It would be as big as a queen mattress and has the same breadth as a full mattress. People who sleep alone and want an additional leg or pet room generally benefit from a full XL bed.  But remember that a full XL mattress will be a little more challenging to locate than a full or queen mattress. It is mainly because full XL mattresses aren’t common in the industry. They cover up too much space and can only accommodate one person.  That is why most people go with a full-size mattress or queen and skip full XL. However, the breadth of the full-size or double mattresses or bed frames is equal to that of a full XL mattress, but the height is 5 inches less.  A full XL bed extends its length by 5 inches, offering a mattress similar to full size but the same height as a queen or king size. A full XL can be the best choice if your bedroom is small, but you have a taller person sleeping On the mattress. Best For: It is most suitable for young adults and couples. Room Size: A room that is at least 12 feet by 12 feet in size is recommended for the placement of a full-size mattress.


Dimensions: 60 x 80 (Inches) A queen-size mattress is familiar with couples who don’t need a lot of room or with lone adults who want to spread out when they sleep. It can be an excellent bed for the primary or guest bedroom, quickly allowing extra guests in the home for a few days because the regular queen size is advised for couples. 

The most popular standard-size mattress can accommodate many sleepers and conveniently fits into any space. There is also a split queen option for the queen-size mattress. 

In this design, the queen size is divided into two equal portions to accommodate couples with various mattress tastes, allowing them to have a mattress that suits them as they share a bed.

Best For: Like couples, people who like to spread out will enjoy it the most.

Room size: A master suite that is at least 10 feet by 10 feet is ideal for a queen-sized mattress.


Dimensions: 76 x 80 inches Having a king-sized bed is like sleeping in a palace. There is sufficient space for two people to spread out and have their own personal sleeping area.

Compared to the California King, it has a width that is 4 inches larger, but the length is 4 inches smaller.  The king-size mattress is the standard mattress size that is the widest available, making it an excellent option for families.

If the parents want to sleep in the same bed as their children, this size is large enough to accommodate everyone. There is also a split option available for the king-size mattress, which consists of two mattresses of the Twin XL size placed next to each other.

The option of a split king mattress is provided for couples who feel they have distinct requirements for their sleeping surface. This allows the couple to share one bed while enjoying the benefits of two distinct mattresses. This layout is ideal for customizable beds that have split-side functionality. It is also a good choice for bunk beds.

Best For: It is ideal for families or couples who don’t mind sharing a bed with their young children.

Room Size: The ideal setting for a king mattress is a large master suite, preferably one that is at least 12 feet by 12 feet in size.

California King

Dimensions: 72 x 84 (inches) The assumption that a California king mattress is bigger than a standard king mattress is fairly common among people who are shopping for mattresses. However, California king mattresses are only longer, not wider, than standard king mattresses.

No doubt, they are lengthier than the king size, but they are also 4 inches slimmer than the king size. Because of its lavish length, it is ideally suited for taller individuals, particularly those who are over six feet tall. Consequently, in a California king bed, you lose some of the widths that you gain in length; however, the additional length makes the bed suitable for tall people.

Two people can sleep comfortably in a California king bed, and there is sometimes room for a third person to sleep there as well, such as when parents share a bed with their children. Because of this, it is a great option for families. You can split the California king mattress into two pieces. This design divides the California king mattress into two halves to accommodate partners with varying preferences regarding their mattresses.

Best For: It is most suitable for married couples who already have children or pets and desire a luxurious amount of space.

Room Size: The ideal setting for a California king mattress is a big master suite that is at least 12 feet by 12 feet in size.

What Size of Bed Is Right for Me?

If it is time for you to purchase a new mattress, you may be pondering the question of which size is ideal for you. There are a lot of different aspects to think about. These include the number of people who will be sleeping in the bed and the amount of space that you will require.

The purchase of a new mattress is not an instance in which one size fits all, so it is essential to assess your specific requirements before making a purchase. If you have a history of sleep problems, you may want to take advantage of a free trial period to ensure that your new mattress is the right fit for you before making the purchase. When selecting a mattress, the following are some additional important considerations you should keep in mind:

  • How Many People Will Use the Bed?

The most important factor to consider before buying the bed is the number of people who will use it. It is important to determine whether you are buying the bed for yourself only or you have a partner too. Having children or pets also requires more space.

All of these factors should go into deciding the size of the bed you purchase. Usually, twin, twin XL, or full mattresses are enough for a single person. If you’re two sleepers, you’ll need queen, king, or California king beds to sleep comfortably. 

Similarly, also consider your sleeping patterns. If you like sleeping close to your partner or pet, you might not need a very large bed. In case you like stretching during your sleep or moving around, having a California king bed is the best choice.

If you have one pet only, getting a twin or twin XL bed is the right choice. However, having more than one pet can make life on these beds difficult. In that case, you’ll need a bigger bed to accommodate your pets easily.

  • The Room Size

The amount of space you have in your room is another important factor here. If you are a minimalist with a few items in your room, you can have a bigger bed.

However, having a room full of other stuff doesn’t leave much space for a bed, making you settle for a smaller option. It is always tempting to buy your favorite bed you saw on the internet, but the dimensions of your room bind you. 

First of all, you need to calculate the dimensions of your room by multiplying its length by the width to get the total area. You can also calculate the size of your room if it’s not a square one by dividing it into different portions. Calculate the area of different portions and add them up to get the total area. Once you have calculated the area, you can decide the bed size you want. Ideally, there should be a space of two feet around the bed for walking.

If it is too clogged, you’ll keep hitting the bed walls time and again. The space is also crucial for opening the drawers and closets of the bed seamlessly. Here is a simple chart that will help you select the right sized bed for your room:

Toddler Bed: 27×52″ Twin: 38×75″ Twin XL: 38×80″ Full: 53×75″ Full XL: 54×80″ Queen: 60×80″ California King: 72×84″ King: 76×80″

  • Your Body Size

Your body size is also crucial for selecting the right bed. Knowing your height and width beforehand is important when you’re in the market for a bed. A typical twin bed is 75 inches, and a twin XL is 80 inches long.

If your height is above 6 feet 2 inches, a twin mattress won’t cut it for you. In that scenario, you need to go for a queen, king, or California king bed, which is enough for someone as tall as 6 foot 7 inches. Those above 7 feet should only look for a California king bed. Similarly, those with more width and who want more space on either side of the bed should opt for a queen or king bed.

  • The Budget

Choosing the right size for your bed is also about the amount of money you’re willing to spend on it. Once you have your budget set, choosing a bed becomes much easier. The bigger the size, the greater the price you pay.

For instance, the king is pricier than the queen, and the queen is more expensive than the full. The trick here is to strike the right balance between budget & size.

Who Is Best Suited to a Twin Mattress?

Without a doubt, the most suitable option for everyone is the twin-sized mattress. Many people who sleep alone prefer having a lot of space to move around in while they sleep, whereas couples and people who share a bed find that twin beds are too narrow for their needs. Twin mattresses are a good investment for the following sleepers.

Toddlers and Kids

Twin-size mattresses are best for children. Because these mattresses provide more than sufficient space for most growing children, considering the likelihood of future growth spurts, the purchase of a twin-size bed as a first “big kid” bed can be a wise financial decision. Additionally, twin mattresses take up less space than mattresses of other sizes, which can be convenient in cases where the child’s bedroom is on the more compact side. 


Teenagers typically go through significant growth spurts, just like younger children and toddlers do. Teens taller than 6 feet 2 inches won’t have enough room to stretch out on a twin bed, but these mattresses should give those under that height plenty of space to move around without their feet hanging off the end of the bed.

College Students

Since larger bed sizes take up more floor space, many university students who share apartments opt for twin beds because of their relatively narrow and smaller dimensions. The cost of a twin mattress is typically lower than other mattresses, making it a good option for students on a tight budget.

Single Adults

If you do not typically sleep with another person and do not share your bed very often, then a mattress in the twin size should provide sufficient space for you. This is assuming that your height does not surpass 6 feet 2 inches, but if your height is 6 feet, you may require a mattress in the twin XL size. If your apartment or bedroom is on the smaller side and you want to make the most of the space that you have, twins are an excellent choice.

Those with Guest Rooms: 

If you regularly have visitors who are traveling solo, it’s a good idea to buy a twin mattress. They’re more compact than sofa beds and futons and won’t take up as much room as a regular couch when not in use.

FAQs About Twin Mattress

What’s the difference between a twin and a single mattress? 

Ans: There is no difference between a twin & single mattress. Both are essentially the same with similar dimensions. They measure 38×75″ and are slightly shorter than twin XL. Furthermore, they can accommodate a single person easily. The name twin got popularized because they are often placed alongside each other in children or hostel rooms that are to be shared by more than one person.

What’s the smallest mattress available?

Twin or single is the smallest mattress available, and they are the most popular choice for single adult sleepers and children. Those who need a slightly longer bed can opt for a twin XL.

What’s the difference between twin XL & full? 

The twin XL is longer but narrower than a full. Since a twin XL is longer, it is well suited for taller people. However, it cannot accommodate more than one person due to its limited width. Twin XL is ideal for bedrooms that are narrow and have tight spaces. Therefore, you’ll often find them in college dorm rooms and apartments.

What’s the usual size of a double mattress?

Usually, a double-size mattress measures around 53 inches by 75 inches. It is a bit small but still can accommodate two people.

Is a full bed enough to accommodate two people?

A full bed, also known as a double bed, is large enough to accommodate two people. It was one of the most popular choices for couples until the 1960s. One of the reasons behind their popularity is that they can fit smaller rooms too. It’s 53 by 75 inches, allocating 26.5 inches to each. However, the queen bed is 30 inches, and the king offers 38 inches. If you want a spacious bed, try the queen or king instead of a full bed.

How do a queen & full bed differ?

Full and queen are the most popular choices for couples around the world, thanks to their comfortable space. A full bed measures 53 by 75 inches, and a queen bed measures 60 by 80 inches. Full beds are for those who don’t move around a lot during their sleep and sleep close. On the other hand, queen beds are for those who like to sprawl during their sleep and need lots of space. 

What’s the difference between a king and a California king bed?

A king mattress is 4 inches wider than a California king mattress, providing you with some extra width. On the other hand, a California king is 4 inches longer, making it more suitable for taller folks.

Is the king the largest bed size?

A: The king is the widest but not the longest bed available on the market. The longest bed is the California king, which is slightly narrower. Choosing one of them depends on your preferences. Both beds are large enough to accommodate two adults. Taller people should go for California king as it is slightly longer.

How to measure a mattress size?

To determine the right size of the mattress, measure both its length and width. If you want to determine the length, measure it from head to toe. To determine its width, measure it from one side to the other. Measuring its height/depth from the bottom might also come in handy. Use a tape measure for measurements and repeat the process to ensure you have the right numbers before you buy the encasement/bed. 

Conclusion: How Long Is A Twin Mattress?

Your mattress is a crucial part of your daily life. That’s where you rest at night after a tiresome day. If you get a quality mattress of the right size, it can add an important element of comfort to your life. On the other hand, choosing a bad one can compromise your sleep & health.

The twin size has many advantages that larger mattress sizes do not have. It’s a constant battle, twin vs. other single mattresses, but the former always comes out on top thanks to the advantages it offers.

Twin-size beds and mattresses are typically the most cost-effective option. Twin mattresses are also the most space-efficient option for those with limited room in their bedrooms. Therefore, before purchasing a mattress, you should always choose the one that meets your requirements the best.  

Share this Article